JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Chao Li,Yun Teng,Huanong Cheng,Hongwei Jin,Kangkang Li,Zhou Feng,Zhonghao Li,Xinshun Tan,Shiqing Zheng
The density and viscosity of N-butylmorpholine bromide iron-based ionic liquids ( r FeCl 3 / [Nbmm]Br) with two iron-morpholine ratios ( r = 0.8 and 1.0) mol·mol −1 were measured at 303.15–348.15 K and 101.3 kPa. Density and viscosity data were fitted by empirical correlations for temperature. The average relative errors were less than 0.02 % and 2 %, respectively. The density and viscosity decrease with increasing temperature. The density increases with the increase of r , while the viscosity shows the opposite trend. The gas-liquid equilibrium data of H 2 S in r FeCl 3 /[Nbmm]Br were measured by the isochoric pressure drop method at temperatures of 303.15–348.15 K, pressures of 0–200 kPa, and r of 0.8 and 1.0 mol·mol −1 . The total solubility of H 2 S increases with decreasing temperature, increasing pressure, and decreasing r . The measured solubility data were fitted by the reaction equilibrium thermodynamic model. Chemical reaction equilibrium constant and the Henry's constant at different temperatures and different r were obtained. The average relative error of model fitting is less than 3 %. The results show that the chemical reaction equilibrium constant and the Henry’s constant both decrease with the increase of r , and decrease of temperature. Effect of molecular structure on reaction equilibrium constants was explained by quantum chemistry calculation. The absorption of H 2 S in r FeCl 3 / [Nbmm]Br at low pressure is dominated by chemical absorption. With the increase of pressure, the proportion of physical absorption continues to increase, and gradually occupies the main part.
研究领域:
化学工程
·
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2025
·Vol. 27
·期 9
·2538-2553
·
IF 9.2
Yadan Luo,Linlin Liang,Huaying Luo,Fanyan Zeng,Chengrong Qin,Chen Liang,Baojie Liu,Caoxing Huang,Shuangquan Yao
Lignin nanoparticles (LNPs) address the challenges associated with the complex chemical structure and high molecular weight of lignin, thereby facilitating green value-added transformations. However, the heterogeneity of lignin significantly influences the self-assembly behavior of LNPs. To obtain lignin with optimal performance for the preparation of LNPs, a novel deep eutectic solvent (DES) featuring a robust hydrogen bond network (choline chloride/tartaric acid-FeCl3, CC/TA-FeCl3) was developed in this study. Extracted lignin exhibited a higher phenolic hydroxyl content and lower molecular weight. Specifically, the phenolic hydroxyl content (2.90 mmol g−1) increased by 15.54% compared to that extracted using (CC/lactic acid-FeCl3 (CC/LA-FeCl3)). Amphiphilic nanoparticles were synthesized via layer-by-layer self-assembly utilizing van der Waals forces and π–π interactions. They had a narrow particle size distribution (21–76 nm) and a small average particle size (35.33 nm). They exhibited a highly negative zeta potential of −31.25 mV and demonstrated effective free radical scavenging efficiency (79.87%). The water dispersion stability over 72 h was improved by 200%. The LNPs significantly enhanced the UV resistance (80%), tensile strength (72%), and hydrophobic characteristics (125%) of PVA films. LNPs/PVA film provides the feasibility for the high-quality development of green agriculture. These results provide a new approach for the green transformation of lignin through the preparation of efficient extraction and preparation of high-performance LNPs.
研究领域:
材料科学
·
环境科学
·
农业科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Meihui Ren,Haijun Zhang,Yun Fan,Dan Wang,Rong Cao,Yuan Gao,Jiping Chen
Thiourea can effectively inhibit the formation of highly toxic chlorinated aromatics in postcombustion zone. However, the inhibition mechanism was still not adequately understood. In this study, naphthalene was adopted as a model aromatic compound to investigate the inhibition effect and mechanism of thiourea on the formation of chlorinated aromatics via electrophilic chlorination over Cu and Fe chlorides. Thiourea addition resulted in the reductions of 77.6–99.8% and 36.4–98.1% in the yield of polychlorinated naphthalenes from naphthalene chlorination mediated by CuCl2 and FeCl3 at 150–300 °C, respectively. The inhibition efficiency of chlorination presented a decreasing tendency with increasing reaction temperature and O2 content in flue gas. X-ray diffraction analysis revealed that the thiourea-induced reduction of highly active Cu (II) and Fe (III) chlorides to less active Cu (I) and Fe (II) chlorides was a primary mechanism for inhibiting aromatic chlorination. [thiourea–Cu]+ complex generated during the reduction process could be transformed into CuS and Cu2S, and isomeric reaction product NH4SCN could react with Cu2+ to produce Cu(SCN)2 and then also form Cu sulfides, suggesting sulfidization of Cu chloride was another important inhibition mechanism. Chlorination inhibition induced by the volatile decomposition products of thiourea might only play a minor role.
研究领域:
环境科学
·
化学工程
·
催化
·
燃烧化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Cheng Fang,Ping Hu,Shun Dong,Juntao Song,Xinghong Zhang
Smooth, uniform and controllable hydrothermal carbon coatings (HTCCs) had been successfully constructed on the carbon fibers through the efficient hydrothermal transformation approach from renewable carbohydrate. The thickness of HTCC could be effectively tailored from nano-scale to micro-scale by just adjusting the concentration of carbohydrate solution and the oxygen content in the HTCC could be significantly controlled through the high-temperature treatment. As for the growth model of the HTCC, FeCl 3 played a critical role in improving the transformation from glucose to the dehydrated intermediate, mainly composed of 5-hydroxymethylfurfural (HMF), and promoting the conversion from HMF to carbonaceous structure, subsequently. The efficient and scalable preparation route not only offered promising prospects for radically substituting the traditional methods to prepare the carbon coating, but also provided a novel surface modification strategy of carbon fibers in the fields of carbon fiber reinforced composites and flexible textile electronic devices.
研究领域:
材料科学
·
化学工程
·
纳米技术
·
复合材料
·
纺织工程
·
电子学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2019
·Vol. 37
·期 9
·919-929
·
IF 2.804
Yang Shi-Xuan,Fan Zi-Yu,Zhang Feng-Yu,Li Si-Hao,Wu Yi-Xian
The random copolymers of isobutylene (IB) with polar comonomers of 4-acetoxystyrene (ACS) or 4- tert -butoxystyrene (TBO), P(IB- co -ACS) and P(IB- co -TBO), could be successfully synthesized via cationic copolymerization with FeCl 3 -based initiating system. The kinetics of the cationic copolymerization process was in situ investigated by inserting a diamond probe into the reaction system by ATR-FTIR spectroscopy. The chemical structure and incorporation content of polar comonomers in the copolymers were characterized by GPC with RI/UV dual detectors and 1 H-NMR spectroscopy. The corresponding functionalized random copolymers of IB with vinyl phenol P(IB- co -POH) carrying phenolic hydroxyl side groups could be further prepared via the complete hydrolysis of acetoxyl side groups in P(IB- co -ACS) or tert -butoxyl side groups in P(IB- co -TBO) copolymers. The functionalized P(IB- co -POH) copolymers became hydrophilic with water contact angle (WCA) of ca . 80° for the self-assembly in hot water, compared to the hydrophobic polyisobutylene with WCA of ca . 110°. The functionalized P(IB- co -POH) copolymers also displayed an excellent self-healing property due to the interaction of intermolecular hydrogen bonding and formation of three dimentional supramolecular networks from phenolic hydroxyl side groups. Furthermore, P(IB- co -POH) copolymers also provided a good matrix for the homogeneous dispersion for silica nanoparticles due to the formation of hydrogen bonding between copolymer chains and silica nanoparticles.
研究领域:
高分子化学
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Huan Wang,Zicheng Xiao,Zhifeng Yu,Yuntian Ma,Pingfan Wu,Fumin Xue,Wei Guo,Wangda Lu,Xinxin Jiao,Peng Jiang,Minghui Liang
To develop iron-based materials for energy storage is an important issue because of their low cost, abundant storage and high theoretical specific capacitances. Fe(OH) 3 colloids stabilized by FeCl 3 are used as the precursor to fabricate with carbon from glucose and graphene oxide (GO) to prepare superparamagnetic iron oxide/carbon/rGO (reduced graphene oxide) composite for enhanced energy storage performance. Glucose or graphene oxide cannot avoid the aggregation of iron oxides when they are used separately; however, the simultaneous addition of glucose and graphene oxide can supress the aggregation of iron oxide nanoparticles , which is beneficial for energy storage. The characterization results of Fe 2 O 3 -based composites, including XRD , TEM and XPS , reveal that iron oxide nanocrystals in the composites are γ-Fe 2 O 3 . The simultaneous utilization of GO and glucose leads to higher saturation magnetizations of iron oxide than GO or glucose does, and the saturation magnetization of iron oxide in the iron oxide/carbon/rGO composite can be up to 83 emu g −1 . More importantly, the iron oxide/carbon/rGO composites have much higher energy storage performance than that of iron oxide/carbon or iron oxide/rGO samples. The specific capacitance of the composites can reach 400 F g −1 and the retention can remain 92% after 2500 cycles.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PHARMACOLOGICAL RESEARCH
·
2021
·
IF 7.658
Shuai Chen,Keyu Lv,Anish Sharda,Jun Deng,Wanjiang Zeng,Chao Zhang,Qinghua Hu,Pengfei Jin,Guangmin Yao,Xulin Xu,Zhangyin Ming,Chao Fang
Classical antithrombotics and antiplatelets are associated with high frequencies of bleeding complications or treatment failure when used as single agents. The platelet-independent fibrin generation by activated endothelium highlights the importance of vascular protection in addition to platelet inhibition in thrombosis prevention. Dihydromyricetin (DHM), the most abundant flavonoid in Ampelopsis grossedentata, has unique vasoprotective effects. This study aims to characterize the antithrombotic potential of DHM. The effects of DHM on the activation of platelets and endothelial cells were evaluated in vitro . Calcium mobilization and activation of mitogen-activated protein kinases (MAPKs) were examined as the potential targets of DHM based on molecular docking analysis. The in vivo effects of DHM were determined in FeCl 3 -injured carotid arteries and laser-injured cremasteric arterioles. The results showed that DHM suppressed a range of platelet responses including aggregation, secretion, adhesion, spreading and integrin activation, and inhibited exocytosis, phosphatidylserine exposure and tissue factor expression in activated endothelial cells. Mechanistically, DHM attenuated thrombin-induced calcium mobilization and phosphorylation of ERK1/2 and p38 both in platelets and endothelial cells. Intravenous treatment with DHM delayed FeCl 3 -induced carotid arterial thrombosis . Furthermore, DHM treatment inhibited both platelet accumulation and fibrin generation in the presence or absence of eptifibatide in the laser injury-induced thrombosis model, without prolonging ex vivo plasma coagulation or tail bleeding time. DHM represents a novel antithrombotic agent whose effects involve both inhibition of platelet activation and reduction of fibrin generation as a result of endothelial protection.
研究领域:
药理学
·
心血管研究
·
分子生物学
·
血栓
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 92
·89484-89491
·
IF 3.289
Yingshuai Liu,Jin Xie,Zeying Zhang,Zhisong Lu
O-GlcNAcylation is a very important post-translational modification of nucleocytoplasmic proteins. Aberrant O-GlcNacylation has been found in a variety of human diseases including many types of cancers, diabetes, and Alzheimer's disease. However, analysis of protein O-GlcNacylation still remains a great challenge due to its low levels and labile nature. Herein, a highly sensitive and reliable colorimetric method is developed by use of wheat germ agglutinin (WGA) lectin for specific recognition of O-GlcNAc and gold nanoparticle (AuNP)-catalyzed copper deposition for signal amplification. In presence of the target molecule, AuNP is specifically introduced onto the sensing surface and then catalyzes the copper deposition. An Au@Cu core–shell structure is produced from the deposition. The obtained copper shell on AuNP is dissolved by FeCl3 due to the oxidation–reduction reaction between copper and Fe3+, resulting in Cu2+ and Fe2+, which subsequently form a red coordination complex in the presence of bathophenanthrolinedisulfonic acid disodium salt (BPT2−). Thus, the amount of the red complex is proportional to the level of O-GlcNAc. Qualitative O-GlcNAc detection is realized by direct readout with the naked eye, while the quantitative analysis is achieved by measurement of the absorbance using a UV-Vis spectrophotometer. With increasing time, more and more copper is deposited on the surface of AuNP, thus achieving significant signal amplification. Under optimal conditions, an ultralow limit of detection (LOD) down to 0.02 pg mL−1 is achieved with GlcNAc-conjugated BSA as a model analyte. The developed platform was also successfully applied to analyze O-GlcNAcylation levels in prostate cancer cell line PC-3 and normal cell line RWPE-1. The results obtained by the proposed method are in good agreement with the data from protein microarray assays, demonstrating its great potential for sensitive and reliable O-GlcNAcaylation detection in fundamental research and in cancer diagnosis.
研究领域:
生物化学
·
分析化学
·
癌症生物学
·
蛋白质科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yinzheng Li,Guixin Guo,Tianying Chen,Peng Lu,Yanjun Tang
To promote the functionalization of chitosan-based films, lignin separated from Moso bamboo using type IV deep eutectic solvents (DESs; FeCl 3 /glycerol (Gly), AlCl 3 /Gly, and CuCl 2 /Gly) was incorporated into chitosan to prepare lignin/chitosan composite films. For comparison, lignin pretreated with an aqueous NaOH solution was prepared and used for forming a film. The systematic characterization of lignin samples and lignin/chitosan composite films was performed using advanced analytical techniques. Gel permeation chromatography showed that the type-IV-DES-pretreated lignin sample possessed a lower molecular weight and more uniform structure than the NaOH-pretreated lignin sample, which was more conducive to increasing the compatibility between lignin and chitosan. 31 P nuclear magnetic resonance spectroscopy and two-dimensional heteronuclear correlation results revealed that the excellent antioxidant activity of lignin following AlCl 3 /Gly pretreatment was due to the high phenolic hydroxyl group content (1.16 mmol/g). Moreover, the free-radical scavenging capacity of the resulting DES-pretreated lignin/chitosan composite film reached 83.12 %, which was 3.4-fold higher than that of the pure chitosan film. In general, type-IV-DES-pretreated lignin was superior to NaOH-pretreated lignin in terms of enhancing the ultraviolet-shielding ability, antioxidant capacity, and antibacterial properties of the chitosan films. Notably, these films have great potential for use in food packaging applications.
研究领域:
高分子科学
·
材料科学
·
生物技术
·
化学工程
·
食品包装技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 9
·2206242
·
IF 15.1
Xueyu Dou,Hufei Wang,Fei Yang,Hong Shen,Xing Wang,Decheng Wu
Double-network (DN) hydrogels consisting of noncovalent interacting networks are highly desired due to their well-controlled compositions and environmental friendliness, but the low water resistance always impairs their mechanical strength. Here, an anti-swelling hydrogel possessing the core/shell architecture through rational regulation of multiple weak noncovalent interactions is prepared. A composite hydrogel consists of chitosan (CS) and poly( N -acryloyl 2-glycine) (PACG), readily forming the shell-structured DN hydrogel after soaking in a FeCl 3 solution because of in situ formation of chain entanglements, hydrogen bonds, and ionic coordination. The produced DN hydrogels exhibit excellent anti-swelling behaviors and mechanical durability for over half a year, even in some strict situations. Taking the merits of noncovalent bonds in adjustability and reversibility, the swelling property of these hydrogels can be easily customized through control of the ion species and concentrations. A dynamically reversible transition from super-swelling to anti-swelling is realized by breaking up and rebuilding the metal-coordination complexes. This facile but efficient strategy of turning the noncovalent interactions and consequently the mechanics and anti-swelling properties is imperative to achieve the rational design of high-performance hydrogels with specific usage requirements and expand their applicability to a higher stage.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Lijia Qiu,Xufang Zong,Rongfang Yuan,Beihai Zhou,Huilun Chen,Jia Zhang
In this study, graphene-like biochar (IZBC) was prepared by pyrolysis of wheat straw in the presence of catalyst and activator. The formation of graphene in IZBC could be divided into three stages: shell core generation, carburization, and carbon precipitation. When the pyrolysis temperatures were in the ranges of 500–600 ℃, 600–700 ℃, 700–800 ℃ and 800–900 ℃, 17%, 32%, 13% and 38% of graphene were produced, respectively. The contribution ratios of graphene by FeCl 3 , ZnCl 2 and HCl were 64%, 23% and 13%, respectively. Moreover, IZBC was filled with porous wavy three-dimensional graphene nanosheets that enabled self-aggregation to be effectively prevented, which was superior to the striped two-dimensional structure. The adsorption of IZBC for dimethoate was a spontaneous exothermic reaction with the adsorption capacity of 980 μmol/g, which was consistent with the pseudo-second-order and intraparticle diffusion models. The adsorption was inhibited by coexisting cations, anions, and humic acid in water. Dimethoate was adsorbed on graphene through embedded separation, with pore filling, cation- π and electrostatic attraction as the key driving forces. In addition, the adsorbed saturated IZBC could be effectively regenerated for many times by 2 mol/L HCl solution.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Yijing Ai,Fan Shi,Xiao Han,Xiaoqing Li,Wanting Fu,Baoli Wang,Xiaoping Zhang,Wei Sun
In this work, a simple one-step pyrolysis process was designed to synthesize Fe-doped graphite carbon nitride (Fe–C 3 N 4 ) nanosheets with FeCl 3 as Fe source. The resulted samples were characterized by various characterization techniques, and the results showed that Fe species might form Fe–N bonds with N atoms of C 3 N 4 , which was similar to the iron (Ⅲ) porphyrin active center of horseradish peroxidase. Then Fe–C 3 N 4 nanosheet was further mixed with carbon nanotube (CNT) to obtain Fe–C 3 N 4 @CNT nanocomposite, which was further modified on the self-made flexible printed electrode (PE) to construct the flexible working electrode. Fe–C 3 N 4 nanosheets show good catalytic activity for H 2 O 2 and the introduction of CNT can effectively improve the electron transfer efficiency at the modified electrode interface. By combining with wireless portable electrochemical workstation, the sensor shows a wider detection range (10.0 μmol/L–20.0 mmol/L) and a lower limit of detection (0.38 μmol/L, S/N = 3) for the H 2 O 2 analysis. Furthermore, the sensor can be applied to the real time and in-situ analysis of H 2 O 2 secreted from live cells. In word, this self-supported sensing electrode shows great potential applications in monitoring the pathological and physiological dynamics of cancer cells.
研究领域:
材料科学
·
电化学
·
生物传感器
·
纳米技术
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）